Beaten Rafael Nadal happy with performance at Western and Southern Open
The 14-time grand slam champion was beaten 5-7 6-4 7-6 (7-3) in Cincinnati on Thursday as his unconvincing hard-court form continued.
For Nadal, it meant his record on the surface this year is 11-6 ahead of the US Open, which starts on August 31.
But the Spaniard said he had performed as expected during his loss " his second in a row to his countryman.
"I was there during the whole match with the right intensity, with the right attitude, doing the things that I have to do, trying to be more aggressive, trying to go to the net more often," Nadal told the ATP World Tour website.
"That's what I did. But I played against an opponent that he played a fantastic match, I think. He played the best match ever against me, without a doubt.
"For me it's a tough loss because I was playing better and my feelings on court were better than they were before."
Nadal was knocked out in the quarter-finals in Montreal and failed to get even that far in Cincinnati, a worrying run as he aims for a third US Open title.